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  1. #include "TROOT.h"
  2. #include "TFile.h"
  3. #include "TBenchmark.h"
  4. #include "TH1F.h"
  5. #include "TH2F.h"
  6. #include "TH3F.h"
  7. #include "TCanvas.h"
  8. #include "TStyle.h"
  9. #include "TPad.h"
  10. #include "TF1.h"
  11. #include "TGraph.h"
  12. #include "TSpectrum.h"
  13. #include "stdio.h"
  14.  
  15. #include "include/RTUtil.h"
  16.  
  17. double getNoise(TH2F*, int, int);
  18.  
  19. int thresholdScan(char filename[256] = "test", char plopt[256]="th", int chXstart=0, int chXend=7, int chYstart=0, int chYend=7, bool debug = false)
  20. {
  21.   const int c_nChannels = 64;
  22.   const double c_xOffset = 1; // mm
  23.   const double c_yOffset = 0.7;
  24.  
  25.   int map[8][8]={{32,34,53,55,40,42,61,63},
  26.                  {48,50,37,39,56,58,45,47},
  27.                  {33,35,52,54,41,43,60,62},
  28.                  {49,51,36,38,57,59,44,46},
  29.                  {17,19,4,6,25,27,12,14},
  30.                  {1,3,20,22,9,11,28,30},
  31.                  {16,18,5,7,24,26,13,15},
  32.                  {0,2,21,23,8,10,29,31}
  33.                 };
  34.                
  35.                
  36.   RTSetStyle(gStyle);
  37.  
  38.   // open the file with histograms
  39.   char fnameroot[256];
  40.   TFile* rootfile;
  41.         sprintf(fnameroot, "root/%s.root", filename);
  42.         rootfile = (TFile *) gROOT->FindObject(filename);
  43.         if(rootfile==NULL) rootfile = new TFile(fnameroot);
  44.         if(rootfile==NULL) {
  45.           printf("Cannot open root file %s!!!\n",fnameroot);
  46.           return(0);
  47.         }
  48.  
  49.   if (strstr(plopt, "th") != NULL) {
  50.    TCanvas* canvas1 = new TCanvas("canvas1","",800,800);
  51.    canvas1->cd();
  52.    //gPad->SetLogz();
  53.    //canvas1->SetLogz();
  54.    TH2F* h_threshold = (TH2F*) rootfile->Get("h_threshold");
  55.    h_threshold->SetTitleOffset(1.5,"y");
  56.    //h_threshold->GetZaxis()->SetRangeUser(0,1000);
  57.    h_threshold->SetContour(20);
  58.    
  59.    h_threshold->Draw("colz");
  60.    
  61.    TCanvas* canvas2 = new TCanvas("canvas2","",1600,800);
  62.    canvas2->Divide(2);
  63.    TH1D* h_projection1 = h_threshold->ProjectionY("Ch 37",38,38);
  64.    canvas2->cd(1);
  65.    //h_projection1->GetYaxis()->SetRangeUser(0,1000);
  66.    //gPad->SetLogy();
  67.    h_projection1->Draw();
  68.    
  69.    TH1D* h_projection2 = h_threshold->ProjectionY("Ch 38",39,39);
  70.    canvas2->cd(2);
  71.    //gPad->SetLogy();
  72.    h_projection2->Draw();
  73.   }
  74.  
  75.   if(strstr(plopt, "tdc") != NULL) {
  76.     TCanvas *canvas21 = new TCanvas("canvas21","canvas21",1600,800);
  77.     TH3F* h0 = (TH3F*) rootfile->Get("h_correctedTDC");
  78.           Int_t binsX = h0->GetXaxis()->GetNbins();
  79.     Int_t minX  = h0->GetXaxis()->GetFirst();
  80.     Int_t maxX  = h0->GetXaxis()->GetLast()+1;
  81.     Int_t binsY = h0->GetYaxis()->GetNbins();
  82.     Int_t minY  = h0->GetYaxis()->GetFirst();
  83.     Int_t maxY  = h0->GetYaxis()->GetLast()+1;
  84.     Int_t binsZ = h0->GetZaxis()->GetNbins();
  85.     Int_t minZ  = h0->GetZaxis()->GetFirst();
  86.     Int_t maxZ  = h0->GetZaxis()->GetLast()+1;
  87.     Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
  88.     Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
  89.     Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
  90.     Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
  91.    
  92.     canvas21->Divide(2);
  93.     //h0->Draw();
  94.     canvas21->cd(1);
  95.     //h0->Project3D("xy")->Draw("colz");
  96.     //canvas21->cd(2);
  97.     //h0->Project3D("yz")->Draw("colz");
  98.     //canvas21->cd(3);
  99.     TH2D* h_correctedTDC = (TH2D*) h0->Project3D("xz");
  100.     //h0->GetZaxis()->SetRangeUser(-5,5);
  101.     //h0->Project3D("xzo")->Draw("colz");
  102.     h_correctedTDC->SetTitle("; t [ns]; Channel");
  103.     h_correctedTDC->Draw("colz");
  104.     /*
  105.     TH1F* tdc1 = new TH1F("tdc1",";TDC [ns];Events",binsZ, minZ, maxZ);
  106.     //for(int j=minY; j<maxY; j++) {
  107.       for(int k=minZ; k<maxZ; k++) {
  108.         double signal = h0->GetBinContent(1,1,k);
  109.         tdc1->Fill(k,signal);
  110.         //}
  111.         }
  112.     tdc1->Draw();
  113.     */
  114.    
  115.     TH2D* h_timeWalk = (TH2D*) h0->Project3D("zy");
  116.     canvas21->cd(2);
  117.     h_timeWalk->SetTitle(";Threshold [V]; t [ns]");
  118.     h_timeWalk->Draw("colz");
  119.   }
  120.  
  121.   if(strstr(plopt,"16") != NULL)
  122.   {
  123.   TH2F* h_threshold = (TH2F*) rootfile->Get("h_threshold");
  124.   TCanvas* canvas = new TCanvas("canvas","",1600,1600);
  125.   canvas->cd();
  126.   TVirtualPad *main = new TPad("main","main",0,0,1,1,10,1);
  127.   main->Draw();
  128.   main->Divide(4,4);
  129.   for(int i=chXstart; i<chXend; i++) {
  130.     for(int j=chYstart; j<chYend; j++) {
  131.       int channel = map[i][j];
  132.       TH1D* h_projection = h_threshold->ProjectionY("",channel+1,channel+1);
  133.       int canvasPosition = i-chXend+4*(chYend-j)+1;
  134.       printf(" %d ", canvasPosition);
  135.       main->cd(canvasPosition);
  136.       char name[128];
  137.       sprintf(name,"Channel %d",channel);
  138.       h_projection->SetTitle(name);
  139.       h_projection->DrawCopy();
  140.     }
  141.   }
  142.   printf("\n");
  143.   }
  144.  
  145.   if( strstr(plopt, "all") != NULL ) {
  146.     TCanvas *canvas2 = new TCanvas("canvas2","Hits x;;",2000,2000);
  147.     TCanvas *canvas3 = new TCanvas("canvas3","Hits y;;",2000,2000);
  148.     canvas2->Divide(8,8);
  149.     canvas3->Divide(8,8);
  150.     TH1F* h_hitsx;
  151.     TH1F* h_hitsy;
  152.     for(int i=0; i<c_nChannels; i++) {
  153.       canvas2->cd(i+1);
  154.       char hname[128];
  155.       sprintf(hname, "hnhitsx%d", i);
  156.       h_hitsx = (TH1F*)rootfile->Get(hname);
  157.       h_hitsx->Draw();
  158.       canvas3->cd(i+1);
  159.       sprintf(hname, "hnhitsy%d", i);
  160.       h_hitsy = (TH1F*)rootfile->Get(hname);
  161.       h_hitsy->Draw();  
  162.     }
  163.   }
  164.  
  165.   if( strstr(plopt, "x") != NULL ) {
  166.     TCanvas *canvas10 = new TCanvas("canvas10","Ch x;;",500,500);
  167.     TH1F* h_hitsx;
  168.     canvas10->cd();
  169.     char hname[128];
  170.     sprintf(hname, "hnhitsx%d", chXstart);
  171.     h_hitsx = (TH1F*)rootfile->Get(hname);
  172.     h_hitsx->Draw("colz");
  173.   }
  174.  
  175.   if( strstr(plopt, "y") != NULL ) {
  176.     TCanvas *canvas11 = new TCanvas("canvas11","Ch x;;",500,500);
  177.     TH1F* h_hitsy;
  178.     canvas11->cd();
  179.     char hname[128];
  180.     sprintf(hname, "hnhitsy%d", chXstart);
  181.     h_hitsy = (TH1F*)rootfile->Get(hname);
  182.     h_hitsy->Draw();
  183.   }
  184.  
  185.   if( strstr(plopt, "share") != NULL ) {
  186.    /*TCanvas *canvas4 = new TCanvas("canvas1","canvas1",1000,1000);
  187.    int nChannels = chYend-chYstart+1;
  188.    int ncols = nChannels/2;
  189.    printf("nch %d nch\\2 %d\n", nChannels, ncols);
  190.    canvas4->Divide(2,ncols);
  191.    TH1F* h_hitsy;
  192.    for(int i=chYstart; i<=chYend; i++){
  193.      canvas4->cd(i-chYstart+1);
  194.      char hname[128];
  195.      int chPosition = map[0][i];
  196.      sprintf(hname, "hnhitsy%d", chPosition);
  197.      h_hitsy = (TH1F*)rootfile->Get(hname);
  198.      h_hitsy->Draw();
  199.    }*/
  200.    
  201.    TCanvas *canvas4 = new TCanvas("canvas4","canvas4",500,500);
  202.    canvas4->cd();
  203.    for(int i=chXstart; i<=chXend; i++) {
  204.      TH1F* h_hitsx;
  205.      char hname[128];
  206.      int chPosition = map[i][chYstart];
  207.      sprintf(hname, "hnhitsx%d", chPosition);
  208.      h_hitsx = (TH1F*)rootfile->Get(hname);
  209.      h_hitsx->SetTitle("Scan X;x [mm]; Entries");
  210.      h_hitsx->GetYaxis()->SetTitleOffset(1.3);
  211.      h_hitsx->SetStats(0);
  212.      if (i == chXstart)
  213.       h_hitsx->Draw();
  214.      else {
  215.       h_hitsx->SetLineColor(i+1);
  216.       h_hitsx->Draw("same");
  217.      }
  218.    }
  219.    //sprintf(fullname, "ps/%s_Yshare.eps", filename);
  220.          //canvas4->SaveAs(fullname);
  221.    
  222.    TCanvas *canvas5 = new TCanvas("canvas5","canvas5",500,500);
  223.    canvas5->cd();
  224.    for(int i=chYstart; i<=chYend; i++) {
  225.      TH1F* h_hitsy;
  226.      char hname[128];
  227.      int chPosition = map[chXstart][i];
  228.      sprintf(hname, "hnhitsy%d", chPosition);
  229.      h_hitsy = (TH1F*)rootfile->Get(hname);
  230.      h_hitsy->SetTitle("Scan Y;y [mm]; Entries");
  231.      h_hitsy->GetYaxis()->SetTitleOffset(1.3);
  232.      h_hitsy->SetStats(0);
  233.      if (i == chYstart)
  234.       h_hitsy->Draw();
  235.      else {
  236.       h_hitsy->SetLineColor(i+1);
  237.       h_hitsy->Draw("same");
  238.      }
  239.    }
  240.    //sprintf(fullname, "ps/%s_Yshare.eps", filename);
  241.          //canvas5->SaveAs(fullname);
  242.   }
  243.  
  244.   /** Draws the signal from 8 channels in x-row
  245.     * for one specific y bin, so the background and cross-talk
  246.     * can be estimated.
  247.     * Draws also a 2d scan of these channels.
  248.     */
  249.   if (strstr(plopt, "line") != NULL) {
  250.     TCanvas* canvas6 = new TCanvas("canvas6","canvas6",500,500);
  251.     canvas6->cd(0);
  252.     gStyle->SetOptStat(0);
  253.    
  254.     TH2F* h0 = (TH2F*) rootfile->Get("h2d0");
  255.           Int_t binsX = h0->GetXaxis()->GetNbins();
  256.     Int_t minX  = h0->GetXaxis()->GetFirst();
  257.     Int_t maxX  = h0->GetXaxis()->GetLast()+1;
  258.     Int_t binsY = h0->GetYaxis()->GetNbins();
  259.     Int_t minY  = h0->GetYaxis()->GetFirst();
  260.     Int_t maxY  = h0->GetYaxis()->GetLast()+1;
  261.     Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
  262.     Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
  263.     Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
  264.     Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
  265.     if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
  266.    
  267.     //! 1-dimension position in x vs. hits
  268.     TH2F* h[8];
  269.     TH1F* h_line[8];
  270.     for(int j=0; j<8; j++) {
  271.       h_line[j] = new TH1F("h_line", "h_line", binsX, xLowUser, xUpUser);
  272.     }
  273.    
  274.     for(int j=chXstart; j<=chXend; j++) {
  275.       int chPosition = map[j][chYstart];
  276.       char hname[128];
  277.       sprintf(hname, "h2d%d", chPosition);  
  278.       int histogram = j;
  279.       h[histogram] = (TH2F *) rootfile->Get(hname);
  280.       int noise = getNoise(h[histogram], 1, 160);
  281.       for(int k=minX; k<=maxX; k++) {
  282.         int l=chYstart*20+12;
  283.         //for(int l=12; l<=16; l++) {
  284.           double signal = h[histogram]->GetBinContent(k,l);
  285.           //signal -= noise;
  286.           //signal /= 5*10000.0;
  287.           double eta = -log(1 - signal);
  288.           double x = k*(xUpUser-xLowUser)/double(binsX);
  289.           //double y = l*(yUpUser-yLowUser)/double(binsY);
  290.           h_line[j]->Fill(x-c_xOffset, signal);
  291.         //}
  292.       }
  293.       if (j == chXstart) {
  294.         h_line[j]->SetTitle("SiPM#2 w/o noise subtraction;x[mm];Hits");
  295.         //h_line[j]->GetYaxis()->SetRangeUser(-0.05, 0.3);
  296.         //h_line[j]->GetYaxis()->SetRangeUser(-50, 2500);
  297.         h_line[j]->Draw("");
  298.       }
  299.       else {
  300.         h_line[j]->SetLineColor(j+1);
  301.         h_line[j]->Draw("same");
  302.       }
  303.     }
  304.    
  305.    
  306.     //! 2d scan
  307.     TCanvas* canvas61 = new TCanvas("canvas61","canvas61",8*200,300);
  308.     canvas61->cd();
  309.     TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX,xLowUser,xUpUser, binsY,yLowUser,yUpUser);
  310.     for(int i=chXstart; i<=chXend; i++) {
  311.       //int canvasPosition = nX*(i-chYstart)+(j-chXstart)+1;
  312.       //int canvasPosition = nX*(chYend-i)+chXstart+1;
  313.       //if (debug) printf("canvas %d\n",canvasPosition);
  314.         int chPosition = map[i][chYstart];
  315.         char hname[128];
  316.               sprintf(hname, "h2d%d", chPosition);  
  317.               int histogram = i;
  318.               h[histogram] = (TH2F *) rootfile->Get(hname);
  319.               int noise = getNoise(h[histogram], 1, 100);
  320.              
  321.               for(int k=minX; k<=maxX; k++) {
  322.           for(int l=minY; l<=maxY; l++) {
  323.             int signal = h[histogram]->GetBinContent(k,l); // detected
  324.             //p /= 10000.;
  325.             //double p0 = 1.0 - p; // events with zero photons
  326.             //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
  327.             //double eta = -log(p0);
  328.             //printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);      
  329.             //double signal = ((p - noise) > 0.1) ? (p-noise) : 0.1;
  330.             double p = signal - noise;
  331.             p /= 10000.0;
  332.             double eta = -log(1 - p);
  333.             double x = k*(xUpUser-xLowUser)/double(binsX);
  334.             double y = l*(yUpUser-yLowUser)/double(binsY);
  335.             h_corrected->Fill(x-c_xOffset, y-c_yOffset, eta);
  336.           }
  337.         }
  338.     }
  339.     h_corrected->SetTitle("SiPM#2 n_pe = - ln(P0);x[mm];y[mm]");
  340.     h_corrected->GetZaxis()->SetRangeUser(-0.05,0.30);
  341.     h_corrected->Draw("colz");
  342.    
  343.   }
  344.  
  345.   /** Draws the sum of the channels
  346.     * Each channel is a 2d plot
  347.     * Intended for the study of 1 channel
  348.     */
  349.   if (strstr(plopt, "2d") != NULL) {
  350.    
  351.     int nX = chXend - chXstart + 1;
  352.     int nY = chYend - chYstart + 1;
  353.     TCanvas* canvas7 = new TCanvas("canvas7","canvas7", nX*400,nY*400);
  354.     printf("nx %d ny %d\n",nX,nY);
  355.     canvas7->Divide(nX,nY);
  356.     for(int i=chYstart; i<=chYend; i++) {
  357.       for(int j=chXstart; j<=chXend; j++) {
  358.       //int canvasPosition = nX*(i-chYstart)+(j-chXstart)+1;
  359.       int canvasPosition = nX*(chYend-i)+(j-chXstart)+1;
  360.       if (debug) printf("canvas %d\n",canvasPosition);
  361.         canvas7->cd(canvasPosition);
  362.         char hname[128];
  363.         int chPosition = map[j][i];
  364.         sprintf(hname, "h2d%d", chPosition);
  365.         TH2F* h_2d = (TH2F*)rootfile->Get(hname);
  366.         h_2d->Draw("colz");
  367.       } //x
  368.     }
  369.    
  370.     // Number of photoelectrons - Poissonian correction
  371.     TCanvas* canvas8 = new TCanvas("canvas8","canvas8", 1000,1000);
  372.     canvas8->cd();
  373.     gStyle->SetOptStat(0);
  374.       char hname[128];
  375.       int chPosition = map[1][2];
  376.       sprintf(hname, "h2d%d", chPosition);
  377.       TH2F* h_2d = (TH2F*)rootfile->Get(hname);
  378.  
  379.       Int_t binsX = h_2d->GetXaxis()->GetNbins();
  380.       Int_t minX  = h_2d->GetXaxis()->GetFirst();
  381.       Int_t maxX  = h_2d->GetXaxis()->GetLast()+1;
  382.       Int_t binsY = h_2d->GetYaxis()->GetNbins();
  383.       Int_t minY  = h_2d->GetYaxis()->GetFirst();
  384.       Int_t maxY  = h_2d->GetYaxis()->GetLast()+1;
  385.       Double_t xLowUser  = h_2d->GetXaxis()->GetBinLowEdge(minX);
  386.       Double_t xUpUser   = h_2d->GetXaxis()->GetBinUpEdge(maxX);
  387.       Double_t yLowUser  = h_2d->GetYaxis()->GetBinLowEdge(minY);
  388.       Double_t yUpUser =   h_2d->GetYaxis()->GetBinUpEdge(maxY);
  389.       if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
  390.       TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX, xLowUser, xUpUser, binsY, yLowUser, yUpUser);
  391.      
  392.       double noise = getNoise(h_2d, 1, 89);
  393.       if(debug) printf("Noise = %f\n", noise);
  394.       for(int k=minX; k<=maxX; k++) {
  395.         for(int j=minY; j<=maxY; j++) {
  396.           double signal = h_2d->GetBinContent(k,j); // detected
  397.           //double p = ((signal - noise) > 1) ? (signal-noise) : 1;
  398.           double p = signal - noise;
  399.           p /= 10000.;
  400.           double p0 = 1.0 - p; // events with zero photons
  401.           //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
  402.           double eta = -log(p0); // constant of the poissonian statistics
  403.           if (debug) printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
  404.           double x = k*(xUpUser-xLowUser)/double(binsX);
  405.           double y = j*(yUpUser-yLowUser)/double(binsY);
  406.           h_corrected->Fill(x+3,y+8, eta);
  407.         }
  408.        }
  409.       h_corrected->SetTitle("n_pe = - ln P(0);x[mm];y[mm]");
  410.       h_corrected->GetZaxis()->SetRangeUser(-0.05,0.3);
  411.       h_corrected->Draw("colz");
  412.      
  413.       // collection efficiency
  414.       int nPoints =0;
  415.       double efficiency=0;
  416.       for (int i=18; i<=58; i++) {
  417.         for (int j=19; j<=59; j++) {
  418.           double signal = h_corrected->GetBinContent(i,j);
  419.           if(debug) printf("signal %f\n",signal);
  420.           efficiency += signal;
  421.           nPoints++;
  422.         }
  423.       }  
  424.     printf("Signal sum = %f\n   # of points = %d\n",efficiency,nPoints);
  425.   }
  426.  
  427.   /** Draws the sum of channel signals
  428.     * Each channel is a 2d ('h2d') histogram
  429.     * Suitable for 8x8 chs scan
  430.     */
  431.   if( strstr(plopt, "sum") != NULL ) {
  432.     int nX = chXend - chXstart + 1;
  433.     int nY = chYend - chYstart + 1;
  434.           TCanvas* canvas12 = new TCanvas("canvas12","c2",8*200, 8*200);
  435.           canvas12->cd();
  436.           gStyle->SetOptStat(0);
  437.  
  438.     // final histogram parameters
  439.     TH2F* h0 = (TH2F*) rootfile->Get("h2d0");
  440.           Int_t binsX = h0->GetXaxis()->GetNbins();
  441.     Int_t minX  = h0->GetXaxis()->GetFirst();
  442.     Int_t maxX  = h0->GetXaxis()->GetLast()+1;
  443.     Int_t binsY = h0->GetYaxis()->GetNbins();
  444.     Int_t minY  = h0->GetYaxis()->GetFirst();
  445.     Int_t maxY  = h0->GetYaxis()->GetLast()+1;
  446.     Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
  447.     Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
  448.     Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
  449.     Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
  450.     if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
  451.     TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX,xLowUser,xUpUser, binsY,yLowUser,yUpUser);
  452.     TH2F* h[9];
  453.    
  454.     // 2d histogram noise subtraction and poisson scaling
  455.     for(int i=chYstart; i<=chYend; i++) {
  456.       for(int j=chXstart; j<=chXend; j++) {
  457.         int chPosition = map[j][i];
  458.         char hname[128];
  459.               sprintf(hname, "h2d%d", chPosition);  
  460.               int histogram = nX*(i-chYstart)+(j-chXstart);
  461.               h[histogram] = (TH2F *) rootfile->Get(hname);
  462.               int noise = getNoise(h[histogram], 1, 170);
  463.               if (debug) printf("noise: %d\n",noise);
  464.               for(int k=minX; k<=maxX; k++) {
  465.           for(int l=minY; l<=maxY; l++) {
  466.             int signal = h[histogram]->GetBinContent(k,l); // detected
  467.             //double p = ((signal - noise) > 0.1) ? (signal-noise) : 0.1;
  468.             double p = signal - noise;
  469.             p /= 10000.;
  470.             double p0 = 1.0 - p; // events with zero photons
  471.             //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
  472.             double eta = -log(p0);
  473.             //printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
  474.             double x = k*(xUpUser-xLowUser)/double(binsX);
  475.             double y = l*(yUpUser-yLowUser)/double(binsY);
  476.             h_corrected->Fill(x-c_xOffset, y-c_yOffset, signal);
  477.           }
  478.         }    
  479.      
  480.       }
  481.     }
  482.  
  483.     h_corrected->SetTitle("SiPM#2 n_p.e.;x[mm];y[mm]");
  484.     //h_corrected->GetZaxis()->SetRangeUser(-0.05,.30);
  485.     h_corrected->Draw("colz");
  486.    
  487.     TCanvas* canvas13 = new TCanvas("canvas13","canvas13",600,300);
  488.     canvas13->Divide(2);
  489.     canvas13->cd(1);
  490.     //h[16]->Draw("colz");
  491.     canvas13->cd(2);
  492.     //h[8]->Draw("colz");
  493.   }
  494.    
  495.   return(0);
  496. }
  497.  
  498. /** Function calculates the noise from one channel
  499.   * it runs through the bins along x and returns the average value
  500.   */
  501. double getNoise(TH2F* histogram, int yStart, int yEnd)
  502. {
  503.   double noise=0;
  504.   int count=0;
  505.   for(int j=yStart; j<yEnd; j++) {
  506.     double value = histogram->GetBinContent(j,2);
  507.     //if (noise < value) noise = value;
  508.     noise += value;
  509.     count++;
  510.     }
  511.   return (noise/double(count));
  512. }
  513.  
  514.